Every week on the day after Monday, we're releasing new shirt designs in the mental_floss store. Today, it's all about Pacman. This shirt won't make you any better at Pac Man, but it will make you worse at math.

And that's not all! Take $10 off your order of $60 or more by using the code SLINKY10 at checkout. The deal starts now and ends on April 22 at midnight PST. (Deal excludes magazine subscriptions, package deals, and clearance.)

Did you know that you can submit t-shirt slogans? If you have a funny t-shirt slogan, you can submit it here.